Msot of the good quality vinyl graphics come in a 3 layer sheet.
The actual graphic is in the middle.

Take the 3 layered graphic and set it into position. Make a Hinge out of masking by taping the top edge of the graphic to the plane.
Fold the graphic up by the hinge, remove the back part exposing the sticky side of the graphic and then just roll the graphic into place. It will be right where you want since you taped it in place with the hinge. Also, by rolling it into position you should have no air bubbles.